I've been working on this e-book for awhile, ever since I talked about iOS animation design & development at a local CocoaConf. As one of those odd designer-developer hybrids, I've never really seen a decent guide that combined animation design theory and live code examples, so I wanted to put one together and get it out there.
Check out some sample pages here and I'd love to hear what HN thinks: http://designthencode.com/motion-sample-1.html